EPA Air · stack tests by county and year
Air-emissions stack tests in DeKalb County, Indiana, 2025
- 77Stack tests
A stack test measures what a source actually emits, at the stack, against the limit in its permit. Each row below is one stack test recorded against a source in DeKalb County, Indiana during 2025. A facility can appear several times: this is the year’s record of what happened, not a list of places. The sources themselves are on the DeKalb County facility page.
DeKalb County, Indiana, 2025
Air-emissions stack tests in DeKalb County, other years
What stands out
- Stack tests in DeKalb County, Indiana, rose from 19 in 2024, the previous year on file, to 77 in 2025.
- The county’s file for stack tests holds 10 years of events, from 2017 through 2026.
- Its 77 stack tests rank 4th of the 64 county cells in Indiana for 2025.
- Its 77 stack tests are 4.8% of the 1,621 the state’s file holds for 2025.
Every line is computed by formula from the state’s stored file; nothing is estimated.
Air-emissions stack tests recorded in DeKalb County, Indiana, 2025
| Date | Facility | Kind | Agency |
|---|---|---|---|
| 2025-09-25 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-25 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-25 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-25 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-25 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-19 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-09-16 | STEEL DYNAMICS, INC. FLAT ROLL GROUP, BUTLER DIVISION — high-priority violation on file | Pass | State |
| 2025-08-27 | BROOKS CONSTRUCTION COMPANY INC | Pass | State |
| 2025-08-27 | BROOKS CONSTRUCTION COMPANY INC | Pass | State |
| 2025-08-27 | BROOKS CONSTRUCTION COMPANY INC | Pass | State |
| 2025-08-27 | BROOKS CONSTRUCTION COMPANY INC | Pass | State |
| 2025-08-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-06-18 | BROOKS CONSTRUCTION COMPANY INC | Pass | State |
| 2025-06-18 | BROOKS CONSTRUCTION COMPANY INC | Pass | State |
| 2025-06-18 | BROOKS CONSTRUCTION COMPANY INC | Pass | State |
| 2025-06-18 | BROOKS CONSTRUCTION COMPANY INC | Pass | State |
| 2025-06-18 | BROOKS CONSTRUCTION COMPANY INC | Fail | State |
| 2025-03-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-03-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-03-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-02-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-02-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-02-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-02-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-02-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-02-04 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-30 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-29 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
| 2025-01-28 | METAL TECHNOLOGIES AUBURN LLC — high-priority violation on file | Pass | State |
Dates as filed by the agency that recorded the stack test. Figures from EPA’s ICIS-AIR download.
What this page shows
This page covers Clean Air Act facilities in the EPA air register with stack tests in DeKalb county, IN, for 2025. It lists 77 stack tests recorded in 2025.